Rolex Datejust 31 mm

The Rolex Datejust 31 mm, reference 278289RBR-0006, comes in an 18 ct white gold case measuring 31 mm across. The dial is dark grey and set with diamonds, and the bezel is diamond-set as well. A scratch-resistant sapphire crystal covers the dial, with a Cyclops lens magnifying the date. Inside is the self-winding calibre 2236, a Superlative Chronometer with a power reserve of approximately 55 hours. The screw-down crown uses the Twinlock double waterproofness system, and central seconds and date functions round out the display. The watch is fitted with a President bracelet in 18 ct white gold, closed by a concealed folding Crownclasp. Rolex rates the case to 100 metres.